Running custom docker image with cloud-on-k8s operator

I'm trying to use the cloud-on-k8s operator to deploy ES on k8s. However, I need to use a different docker image as I need to use Ubuntu instead of CentOS for compatibility with some of our packages and I also need to use debian packaged ES to be compatible with our current plugin deployment workflow.
I was able to create an ES docker image that satisfies both of the above criteria (runs Ubuntu and uses deb packaged ES), however I had some questions:

  1. The operator requires the Elastic license file to be present in /usr/share/elasticsearch (, however the license file is not present in the debian distribution of ES. Is it alright if I add the license to the directory ourselves ? Is it fine to use the debian distribution with the Elastic operator (even if unsupported) ?

  2. I am using the docker-entrypoint file ( in my Dockerfile as well, without any modifications. Am I allowed to do this ?

3.I'm also curious as to why Elastic decided to cover even Dockerfiles under Elastic license. This adds a lot of complications for us (in addition to the operator under Elastic license complicating things) even though we are just using it for internal purposes only.

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